An immunodeficiency disorder describes any condition that weakens the body's ability to fight off infection.
An immunodeficiency disorder can be present at birth, such as severe combined immunodeficiency. It may also be acquired, such as acquired immunodeficiency syndrome (AIDS). A person who has one of these disorders is prone to develop infections. These infections often become severe.
The disorder may be genetic or acquired. AIDS, for example, is caused by a virus that can be spread by transfusion of contaminated blood, sexually, or by using contaminated needles. The risk of acquiring AIDS following blood transfusion has decreased due to routine testing of all blood products.
The symptoms present depend on the type of immunodeficiency disorder. The one thing all such disorders have in common is frequent infections. These infections may occur anywhere in the body.
A history of repeated or unusual infections suggest one of these disorders. A healthcare provider may do various tests, including blood tests and special x-rays, to search for a cause of a weakened immune system.
Most of these disorders cannot be prevented.
AIDS can be prevented by avoiding unprotected sex and by not sharing needles. If a person has sex, condoms can reduce the risk of catching human immunodeficiency virus (HIV), which causes AIDS.
Almost any infection may lead to death if the immune system cannot fight it off.
A person with an immunodeficiency disorder may have infections that can be spread to other people.
Aggressive antibiotic treatment is needed to quell most infections. There may be no treatment for the underlying disorder, though.
Antibiotics can cause allergic reactions and stomach upset. Other side effects depend on the antibiotic used.
Most of these disorders are long-term problems. Repeated treatment for infection and monitoring are needed.
A person who has one of these disorders should see a healthcare provider at the first sign of a possible infection. Otherwise, the type of monitoring done depends on the disorder.
Author:Adam Brochert, MD
Date Written:
Editor:Coltrera, Francesca, BA
Edit Date:04/14/00
Reviewer:Gail Hendrickson, RN, BS
Date Reviewed:09/20/01
Harrison's Principles of Internal Medicine, 1998, Fauci et al.